As investigators worked Monday to determine what caused the fatal helicopter crash that killed Kobe Bryant and eight others, audio recordings of air traffic controllers revealed that the pilot of the luxury chopper was given clearance to fly in worse than normal weather without relying on instruments to guide him.

Shortly before the helicopter crashed on a remote hillside Sunday, the pilot was approved for what’s known as special visual flight rules, according to audio reviewed by The Washington Post.

The recordings will feature in what is expected to be a broad investigation into a crash that shook the sports world, leaving a stunned community of players and fans that continued to come to grips with the loss of the former Los Angeles Lakers star as Monday turned to Tuesday.

The NBA announced that it had canceled the Tuesday night game between the Lakers and Clippers, who also play at home at the Staples Center. The game will be rescheduled at a later date, according to a league statement Monday. The Lakers had formally petitioned the league for the postponement.

Eight games were played Sunday after news of Bryant’s death broke, and they featured tributes to him such as intentional 24- and 8-second clock violations in honor of his two jersey numbers. Some players, though, said they wished the NBA had postponed all of its games Sunday.

“It’s bigger than basketball,” the Wizards’ Isaiah Thomas said after a loss Sunday to the Hawks. “It’s hard to even talk about it. The NBA should’ve just canceled all the games today, for real.”

On Monday, a member of the National Transportation Safety Board said the helicopter’s pilot advised air traffic controllers that he was “climbing to avoid a cloud layer” before the incident. The aircraft didn’t have a black box. The federal agency expects to be at the site for five days.

Los Angeles County Sheriff Alex Villanueva on Monday said his staff had secured the perimeter of the scene, after having had an “inordinate amount of interest in accessing the crash site by unauthorized personnel.” The area was being patrolled by deputies on horseback and on all-terrain vehicles, according to Villanueva.

The investigation will examine weather data, radar information, air traffic control communications, maintenance logs and the pilot’s record, said NTSB spokesman Keith Holloway said.

Find live updates from Monday below.

● Weather conditions and past aviation accidents shed light on the fatal crash.

● NBA teams honored Bryant on Sunday night with poignant shot-clock violations.

● Mourners gathered Monday at Lower Merion High School, where Bryant played as a teenager.

● The NBA on Monday postponed a Lakers-Clippers game that had been scheduled for Tuesday.